Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
dung nhan » dung luan
ho chieu » theo chieu, mot chieu, doi chieu
dung nha » dung ha, dung khoa, dung ngan
cong tac » cong ty
tac hang » tac vang, bac thang, tac chong
hang ban » hang luan, hang va, hang tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) sach - thanh ((dung nha) OR (dung nhan)) thong cong tac hang ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - thanh ((dung nha) OR (dung nhan)) thong cong tac hang ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) sach - thanh ((dung nha) OR (dung nhan)) thong cong tac hang ban*".